Is it just me or the Guild Halls have soo much unused potential? And it is a great moment to change, as the new expansion opened devs to new ideas.
Regarding new restructured WvW it would be awesome to be able to hold trainings in Guild Halls (for guild/alliance members), regarding objectives use, strength of siege, tacivators, movement etc. This being said, it would be great to have some training ground in GH with similar stuff like Arena, but for WvWvW! Being able to actually use the GH siege, or making some "virtual battleground" with the use of "War Room" potential would be epic.
Next idea - use War rooms, as a place to maintain server strategy, so it would be visible as interactive map to alliance and alliance commanders. This would 1) open a whole new potential for "general-commanders" in the "global, alliance strategy", and 2) hugely boost the usability of war room itself.
Shoot your opinions and ideas guys!